Consider the reaction: 2 NH3 (g) → 3 H2 (g) + N2 (g) Which of the following is true about entropy associated with this reaction? A. The entropy of the system will be positive because the mol of gas is increasing. B. The entropy of the system will be negative because the mol of gas is decreasing. C. The entropy of the system will be negative because the mol of gas is increasing. D. The entropy of the system will...
Using the equations N2 (g) + 3 H2 (g) → 2 NH3 (g) AH° = -91.8 kJ/mol C(s) + 2 H2 (g) → CH4 (g) AH° = -74.9 kJ/ mol H2 (g) + 2 C(s) + N2 (g) → 2 HCN (g) AH° = 270.3 kJ/mol Determine the enthalpy for the reaction CH4 (g) + NH3 (g) → HCN (g) + 3 H2 (g).
7) 2 N2(g) + O2(g) → 2 N20(g) AH rxn = + 163.2 kJ a) At 25°C; calculate ASsurr = b) Is ASsys > 0 or < 0? Explain your answer c) Is the reaction spontaneous? AS univ = (ASsurr) + ( ASsys)
Determine AGⓇ rxn for the following reaction at 175 K. T CH 20(g) + 2 H2(g) → CH 4(9) + H2O(g) AH°= -63.9 kJ; AS°= -226.2 J/K O-721.2 kJ -24.3 kJ +519.9 kJ 0 -120.9 kJ 42.2 kJ Determine the sign of AS sys and AS surr for the following chemical reaction. 2 N 2(9) + O 2 (g) → 2 NO 2(9) AH rxn = +2005 KJ O ASsys > 0: ASsurr > 0 O ASsys > 0: ASsurr...
Self-test 4.7 (a) Calculate the standard reaction entropy for N2(g) + 3 H2(g)2 NH3 (g) at 25 °C. (b) What is the change in entropy when 2 mol H2 reacts? Answer: (a) (Using values from Table 4.2)-198.7 J K-1 mol-1; (b) -132.5 J K-1
1. Consider the reaction below. N2(g) + 3 H2(g) ⇋ 2 NH3(g) Which of the following changes would cause less NH3 to be produced? decreasing the volume adding N2 increasing the volume adding H2 2. Consider the following reaction. N2(g) + 3 H2(g) ⇋ 2 NH3(g) The forward reaction is exothermic. Which of the following changes would cause less NH3 to be produced? decreasing the temperature adding H2 increasing the temperature adding N2 3. What is the effect of a...
1. For the following reaction N2 (g) + 3 H2(g) — 2 NH3(g) AH° = -92.4 kJ K = 1.245 x 10-5 at 427°C for each change listed, predict the equilibrium shift and the effect on the indicated quantity. Direction of Shift Gt; or no change) Effect on Quantity Change Effect (increase, decrease, or no change) amount of NH3(g) amount of N2(g) (a) decrease in volume (b) Decrease temperature (c) addition of H2(g) (d) addition of NH3(g) (e) removal of...
7. Given the following information: AHP (kJ mole') Compound H2 (g) N2 (g) Cp (JK' moli) 28.82 29.12 35.06 NH3(g) -46.11 all at 25° C and 1 bar. For the reaction: 3H2(g) + N2 (g) = 2 NH, (g) (14 pts) (a) What is AH for the reaction as written at 25 °C? AH = (b) Predict AH for the reaction at 250 °C from its value at 25 °C. AH = AU = (c) Calculate AU at 25°C for...
9. Calculate ASⓇ, ASsurr, AStot, and AGⓇ at 298 K for the following reaction N2(g) + 3H2(g) → 2NH3(g) at 25*C. AH° = -92.22 kJ/mol Using: Smº[N2, gas) = 191.6J/(K-mol); Sm"[H2, gas) = 130.7J/(K-mol); Sm*[NH3, gas) = 192.4
Self-test 3.5 Determine the difference AH-AU for the reaction N2(g) + 3 H2(g) → 2 NH3(g) at 500 °C. Answer:-13 kJ mol-1